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- ; Test CFG simplify removal of branch instructions.
- ;
- ; RUN: opt < %s -simplifycfg -S | FileCheck %s
- ; RUN: opt < %s -passes=simplify-cfg -S | FileCheck %s
- define void @test1() {
- br label %1
- ret void
- ; CHECK-LABEL: @test1(
- ; CHECK-NEXT: ret void
- }
- define void @test2() {
- ret void
- ret void
- ; CHECK-LABEL: @test2(
- ; CHECK-NEXT: ret void
- ; CHECK-NEXT: }
- }
- define void @test3(i1 %T) {
- br i1 %T, label %1, label %1
- ret void
- ; CHECK-LABEL: @test3(
- ; CHECK-NEXT: ret void
- }
- ; PR5795
- define void @test5(i32 %A) {
- switch i32 %A, label %return [
- i32 2, label %1
- i32 10, label %2
- ]
- ret void
- ret void
- return: ; preds = %entry
- ret void
- ; CHECK-LABEL: @test5(
- ; CHECK-NEXT: ret void
- }
- ; PR14893
- define i8 @test6f() {
- ; CHECK-LABEL: @test6f
- ; CHECK: alloca i8, align 1
- ; CHECK-NEXT: call i8 @test6g
- ; CHECK-NEXT: icmp eq i8 %tmp, 0
- ; CHECK-NEXT: load i8, i8* %r, align 1{{$}}
- bb0:
- %r = alloca i8, align 1
- %tmp = call i8 @test6g(i8* %r)
- %tmp1 = icmp eq i8 %tmp, 0
- br i1 %tmp1, label %bb2, label %bb1
- bb1:
- %tmp3 = load i8, i8* %r, align 1, !range !2, !tbaa !1
- %tmp4 = icmp eq i8 %tmp3, 1
- br i1 %tmp4, label %bb2, label %bb3
- bb2:
- br label %bb3
- bb3:
- %tmp6 = phi i8 [ 0, %bb2 ], [ 1, %bb1 ]
- ret i8 %tmp6
- }
- declare i8 @test6g(i8*)
- !0 = !{!1, !1, i64 0}
- !1 = !{!"foo"}
- !2 = !{i8 0, i8 2}
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